/*
 * File: vfsdriver.c
 *
 * Description: This is a driver program for testing your VFS system using an interaction script as input
 * You need to make additional calls to your respective functions as noted in the comments below
 * Make sure the output you display is exactly as per the given specifications for you. Do NOT print
 * any extra output (like debug messages) in the final version of your driver program. You can use this driver program
 * in a in incremental manner as you keep implementing one operator after another. For operators not yet implemented,
 * you can leave the output as given ("TO_BE_DONE"). So you can use this program as your "main" program for testing purposes.
 *
 * DO NOT write the full code for operators in the driver program! You must only CALL your functions from here.
 *
 * Usage: vfsdriver <scriptfilename>
 */

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include"../include/lib_headers.h"

#define BUFSIZE 200
#define CMDSIZE 30
#define PARSIZE 100

void createvfs ( char *P1, int P2 );
void mountvfs ( char *P1 );
void unmountvfs ( char *P1 );
void makedir ( char *P1, char *P2 );
void deletedir ( char *P1 );
void movedir ( char *P1, char *P2 );
void listdir ( char *P1, int P2, char *P3 );
void addfile ( char *P1, char *P2, char *P3 );
void listfile ( char *P1, char *P2 );
void updatefile ( char *P1, char *P2 );
void removefile ( char *P1 );
void movefile ( char *P1, char *P2 );
void copyfile ( char *P1, char *P2 );
void exportfile ( char *P1, char *P2 );
void searchfile ( char *P1, char *P2 );

void processcommand( char *command, char *P1, char *P2, char *P3 );

char output[SIZE];
char *outputptr;
int main( int argc, char *argv[] )
{
	FILE *scriptfp;
	char linebuffer[BUFSIZE];
	char command[CMDSIZE], par1[PARSIZE], par2[PARSIZE], par3[PARSIZE];
	char *token;
	

	if( argc != 2 ){
		fprintf(stderr,"Usage: vfsdriver <scriptfile>\n");
		return(1);
	}

	if( (scriptfp=fopen(argv[1],"r")) == NULL ){
		fprintf(stderr,"Unable to open script file: %s\n", argv[1]);
		return(2);
	}

	while( fgets(linebuffer, sizeof(linebuffer), scriptfp) != NULL ){
		/* This output is for debugging... do not uncomment in final version */
		/*
		printf("==================================================\n");
		printf("Processing: %s", linebuffer);
		printf("==================================================\n");
		*/

		/* Remove the extra newline character in the end of line */
		linebuffer[ strlen(linebuffer)-1 ] = '\0';
		
		/* Get the command and the parameters using tokenizer */
		strcpy( command, (token = strtok(linebuffer, " ")) == NULL ? "" : token );
		
		strcpy( par1, (token = strtok(NULL, " ")) == NULL ? "" : token );
		strcpy( par2, (token = strtok(NULL, " ")) == NULL ? "" : token );
		strcpy( par3, (token = strtok(NULL, " ")) == NULL ? "" : token );
		/* printf("Command:%s:p1:%s:p2:%s:p3:%s\n",command, par1, par2, par3); */

		processcommand( command, par1, par2, par3 );
	}
}

void processcommand( char *command, char *P1, char *P2, char *P3 )
{
	if( strcmp(command, "createvfs") == 0 ){
		int size = atoi(P2);
		createvfs (P1,size);
	}
	else if( strcmp(command, "mountvfs") == 0 )
		mountvfs (P1);
	else if( strcmp(command, "unmountvfs") == 0 )
		unmountvfs (P1);
	else if( strcmp(command, "makedir") == 0 )
		makedir (P1,P2);
	else if( strcmp(command, "deletedir") == 0 )
		deletedir (P1);
	else if( strcmp(command, "movedir") == 0 )
		movedir (P1,P2);
	else if( strcmp(command, "listdir") == 0 ){
		int flag = atoi(P2);
		listdir (P1,flag,P3);
	}
	else if( strcmp(command, "addfile") == 0 )
		addfile (P1,P2,P3);
	else if( strcmp(command, "listfile") == 0 )
		listfile (P1,P2);
	else if( strcmp(command, "updatefile") == 0 )
		updatefile (P1,P2);
	else if( strcmp(command, "removefile") == 0 )
		removefile (P1);
	else if( strcmp(command, "movefile") == 0 )
		movefile (P1,P2);
	else if( strcmp(command, "copyfile") == 0 )
		copyfile (P1,P2);
	else if( strcmp(command, "exportfile") == 0 )
		exportfile (P1,P2);
	else if( strcmp(command, "searchfile") == 0 )
		searchfile (P1,P2);
	else
		printf("Ignoring invalid command %s\n", command);
}

void createvfs ( char *P1, int P2 )
{
	printf("%s\n",(char*)create_vfs(P1,P2));	
}

void mountvfs ( char *P1 )
{
	printf("%s\n",(char*)mount_vfs(P1));
}

void unmountvfs ( char *P1 )
{
	printf("%s\n",(char*)unmount_vfs(P1));
}

void makedir ( char *P1, char *P2 )
{	
	printf("%s\n",(char*)make_dir(P1,P2));
}

void deletedir ( char *P1 )
{
	
	printf("%s\n",(char*)delete_dir(P1));
}

void movedir ( char *P1, char *P2 )
{
	printf("%s\n",(char*)move_dir(P1, P2));
}

void listdir ( char *P1, int P2, char *P3 )
{
	printf("%s\n",(char*)list_dir(P1, P2, P3));
	
	/*
	if(hashtable != NULL){
 		printf("\nHash Table Output\n----------------------------------------------------------------------------\n");	
 		htable_display(hashtable);
 	}	
 	*/	
	
	/*
	if(l1 != NULL){
 		printf("\nTraversal Output\n----------------------------------------------------------------------------\n");
 		traversal(l1->next);
 		printf("\n");	
 	}*/
 	
 
	/*
	if(bstRoot != NULL){
 		printf("BST Output\n---------------------------------------------------------------------------------------\n");
 		displayList();
 		printf("Count = %d\n",count_nodes_bst(bstRoot));
 		printf("\n\n");
 	}
 	*/	
}

void addfile ( char *P1, char *P2, char *P3 )
{	
	printf("%s\n",(char*)add_file(P1,P2,P3));
}

void listfile ( char *P1, char *P2 )
{
	printf("%s\n",(char*)list_file(P1,P2));
}

void updatefile ( char *P1, char *P2 )
{
	printf("%s\n",(char*)update_file(P1,P2));
}

void removefile ( char *P1 )
{
	printf("%s\n",(char*)remove_file(P1));
}

void movefile ( char *P1, char *P2 )
{
	printf("%s\n",(char*)move_file(P1,P2));
}

void copyfile ( char *P1, char *P2 )
{
	printf("%s\n",(char*)copy_file(P1,P2));
}

void exportfile ( char *P1, char *P2 )
{
	printf("%s\n",(char*)export_file(P1,P2));
}

void searchfile ( char *P1, char *P2 )
{
	printf("%s\n",(char*)search_file(P1,P2));
}


